1 Tablet maintains 20,000 gallons / 76,000L of pool water per week. Lower your overall operating cost of maintaining your pool, by loosening organic debris, calcium and in-organic debris from all equipment related to your pool Helps maintain water balance Prolongs equipment life & liners by removing scale and scum deposits Softens the pool water for a more comfortable bather experience The Pure water experience Use in combination with chlorine, bromine or other oxidiser. Effective with all pools and all types of filters. #956319 POOL PRO TAB 120 CT - 45 LB PAIL AQUAFINESSE (1 TABLET MAINTAINS 20,000 GALLONS PER WEEK)